Sectional link.



JOHN M. THOMSON, F SOURLAKE, TEXAS.

SECTJEON'AL LINK.

TQ all whom t may concern.'

Be it known that I, JOHN M. THoMsoN, a citizen of the United States, and a resident of Sourlake, in the county of Hardin and State of Texas, have invented a new and llmproved Sectional Link, of which the following is a full, clear, and eXact description.

The object of the invention is to provide a new and improved sectional link adapted to be readily opened for engagement with the parts to be connected with each other and then adapted to be closed and locked to hold the parts in coupled relation. Another object is to provide a sectional linkmore especially designed for use on oil well drilling tools `having clevises and bails fined on the blocks or tools. Another obj ect is to prevent bending of the link and throwing it out of` A practical embodiment ofthe invention is represented yin the accompanying drawings forming a part ot this specification, in which similarcharacters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the sectional link with one of the locking membersin locked position;

Fig. 2 is a similar view of the link with the two link members shown in disassembled position; j

Fig. 3 is an edge view ot the sectional link with the locking members in unlocked position; and

Fig. 4 is a sectional plan view of the sectional link on the line 4-4 of Fig. 1.

The sectional link in its general construction consists essentially of two -shaped sections and 11, alike in construction and having Shanks 12 and 13 preferably made cylindrical in cross section. The ends of the shank 12 terminate in integral hooks 14 and 15 of approximately U shape, and the ends of the shank 13 terminate in similar integral hooks 16 and 17. The hooks 14, 15, 16 and 17 are approximately half round in cross section and the hooks 14 and 16 are adapted to overlie each other with their Hat surfaces in contact, and the hooks 15 and 17 are adapted to similarly overlie each other with is made:

specification of Letterskatent. Patientin@ Nauw.. 5, 119187..

Application med :muy e, isis. serial no; 243,591,

the flat surfaces in contact, thus forming a link approximately cylindrical in cross sec` tion throughout its length. j i

rlhe hooks 14 and 15 of the link section 10 are provided at their free ends with slots 2() and 21 adapted to be engaged by tongues 22, 23 projecting from theends of theshank 13 and integral with the flat sides of the bases of the hooks 16 and 17 of the other link section 11. The tree ends of the hooks 16 and 17 of the link section 11 are provided with slots 25, 26 adapted to be engaged by tongues 27, 28 formed integrally on the ends of the shank 12 of the other linkl section 10` and projecting onto and integral with the tlat sides of the hooks 14 and 15 of the link section 10. rllhe terminals of the hooks 14 and 15 are adapted to abut against the ends of the shank 13, `and the terminals of the hooks 16 and 17 abut against the ends of the shank 12 at the time the link sections 10 and 11 are` superimposed one upon the other, as indicated in Figs.` 1, 3 and 4.5 By the arrangement described the link sections are held against movement, but the link sections can be lifted one ed the other toyopen `the link i'or engagement of the link with the parts to be connected with each other.`

ln ordert-o lock the link sections, 10 and lltogether after they are superimposed as above described, the following arrangement @n the shank 12 are mounted to turn two locking sleeves 30 and 31 provided with Z-shaped slots 32, 33 into which project pins 34, 35 integral with the shank 12. Similar locking sleeves and 41 are mounted to turn on the shank 13, and the sleeves are provided with Z-shaped slots 42, 43 into which project pins 44, 45 formed integral on the shank 13. rlhe sleeves 30, 31, 40, 41 are shown in unlocked position in Fig. 2, that is, the sleeves on the corresponding shank are close together with the tongues 22, 23 and 27, 28 completely exposed to allow ot inteihengaging said tongues with the corresponding slots 20, 21 and 25, 26. When this has been done, the sleeves 30, 31 and 40, 41 are turned on their corresponding 4Shanks 12 and 13 and move outwardly from each other to slip over the free ends of the corresponding hooks 16, 17 and 14, 15 and likewise over portions ot the corresponding tongues 22, 23 and 27, 28 to securely lock the link sections 10 and 11 in closed position.

llt is understood that the link sections 30,

'tion'and arranged topermit convenientand 31 and 40,41 *are held against accidental movement in their innermost unlocking positions or in their outermost locking positions by the corresponding-?pins34,I 35 and 44, 45 engaging the slots 32, 33, 42, 43, as Will be readily understood by lcomparison'otI Fissi-21nd?.

"norderto relieve the tongues 22, 23, 27, 28 of some of the sideivise and'endwise strain use ismade of lugs 50, 51 on the fiat sides of thev hooks 14and 1.5, and similar'lugsi52, 53 0n the iiat sides'of thehooks 16 and 17 the lugs 50, 51 engaging corresponding recesses 54,55 formed on the flat sidesoftlie l'hooks v16 Yand 17 and the lugs 52, 53 engaging correspondingrecesses'56, 57 :formed on the flat sides of the hooks 14 and 15.

Fronrthe* foregoing it Will be seen lthat the sectional link is very simple in const-rucquiek openin-gfof the link sections 10 and 11to `*engage theis'ame with the parts to be coupled together., 'It will alsobe noticed that afterfthe link sections are engaged.

ivitlithe part'svto be coupled andare superin'iposed'they are yquickly locked in posit-ion to prevent *accidental lopeningof the link sections. l

Although the-'sectional ylink is more"`es- SO'ipecially 'designed foruseY on oil Well drilling tools havecl'evises and bails 4`fixed or farranged permanently on the blocks'or tools,

it is evident that I do not limit myself lto thisp'a'rtitailar` use of the 'sectional link.

By yproviding they tongues 22, 23, "27 l :and 28, thelinksections are not liable to be distorted"or"bent"wl1en the vlink is subjected to ya heavy strain. y

Having thus described `my invention, 4I

'and tlieshank of the other link section having interlocking engaging means, and locking 'members movable on the said shanks and engaging the corresponding inter-engaging means of the two link sections to lock the latter together.

2. A sectional link, comprising tivo link sections having-halved overlying hook inembers, and a shank betiveen the hookm'ember of each link section, each shank having tongues, andthe free ends of the hooks having slots, of which the slots of the 4hook members of one link section engage the tongues on the shank of the other link section, and locking means movable on the Shanks and engaging the corresponding interlocked tongues'and slots to hold the link sections locked together.

3. 'A sectional link, comprising vtwo link sections eachhaving a shank and'a hookI at cach end of each shank, the shanks having integral tongues andthe free ends of the hooks lhaving slots of which the slots of the hooks on one link section engage the tongues on the shank of the other link section, locking sleevesmounted to turn' and to slide 4on the said Shanks and adapted to fit over the corresponding interlocking tongues and slots, the sleeves having z-shaped slots, and pins on the Shanks engaging lthe said ZLSliape'd: slots in the sleeves to hold the latter-in locked or unlocked position.

JoHNM. THOMSON.

Copies fof'thispatntiay be obtained fr've cents each, by addressing the Commissioner yof Patenti.

` f Washington," D. C. 

